var createError = require('http-errors');
var express = require('express');
var path = require('path');
var fs=require('fs');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
const session=require('express-session');
const RedisStore=require('connect-redis')(session)

//路由引用
// var indexRouter = require('./routes/index');
// var usersRouter = require('./routes/users');
const blogRouter = require('./routes/blog');
const userRouter = require('./routes/user');

var app = express();

// view engine setup
// app.set('views', path.join(__dirname, 'views'));
// app.set('view engine', 'jade');

const ENV=process.env.NODE_ENV;
if(ENV!=='production'){
  //开发环境 || 测试环境
  app.use(logger('dev'));
}else{
  //线上环境
  const logFileName=path.join(__dirname,'logs','access.log');
  const writeStream=fs.createWriteStream(logFileName,{
    flags:'a',//文件追加
  });
  app.use(logger('combined',{
    stream:writeStream,//流：传入指定文件,默认为process.stdout(打印在控制台)
  }));
}

app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
// app.use(express.static(path.join(__dirname, 'public')));

const redisClient = require('./db/redis');
const sessionStore=new RedisStore({
  client:redisClient
})
app.use(session({
  secret:'WJiol#123123_',
  cookie:{
    // path:'/',//默认配置（写不写无所谓）
    // httpOnly:true,//默认配置（写不写无所谓）
    maxAge:24*60*1000
  },
  store:sessionStore,//仓库,把session存入redis
}))

//注册路由
// app.use('/', indexRouter);
// app.use('/users', usersRouter);
app.use('/api/blog',blogRouter);
app.use('/api/user',userRouter);


// catch 404 and forward to error handler检验错误页的处理
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'dev' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
